QB Issue Resolution:

An application identifier (AID) is used to address an application in the card.The AID is printed on all EMV cardholder receipts. You can refer to these support articles to learn more about EMV Standard and Smart Chip cards and EMV requirements.

You can also call our Payment Services support for clarifications. Use this link and scroll down at the bottom to get the number:

https://community.intuit.com/articles/1145257-unlinking-linking-my-merchant-account

Resolution for Issue 'We are trying to make sure our receipts are compliant and want to know what is a, (EMV), card aid and retention reminder?' available: Yes (Solved).
Source: Intuit Community forum.

We are trying to make sure our receipts are compliant and want to know what is a, (EMV), card aid and retention reminder?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for card aid
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Error Recovery for card aid [Canada]
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Additional Support Options: